linux-kernel - Re: [PATCH 1/1] riscv: default to CONFIG_RISCV_SBI

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Date:   Thu, 16 Dec 2021 15:17:25 +0100
From:   Heinrich Schuchardt <heinrich.schuchardt@...onical.com>
To:     Jessica Clarke <jrtc27@...c27.com>
Cc:     Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] riscv: default to CONFIG_RISCV_SBI_V01=n

On 12/16/21 14:49, Jessica Clarke wrote:
> On 16 Dec 2021, at 12:35, Heinrich Schuchardt <heinrich.schuchardt@...onical.com> wrote:
>>
>> The SBI 0.1 specification is obsolete. The current version is 0.3.
>> Hence we should not rely by default on SBI 0.1 being implemented.
> 
> It’s what BBL implements, and some people are still using it,
> especially given early hardware shipped before OpenSBI grew in
> popularity.
> 
> Jess
> 

Do you mean BBL is not developed anymore?

Some people may still be using a 0.1 SBI. But that minority stuck on an 
outdated software stack does not justify defaulting to deprecated 
settings in future Linux releases.

Best regards

Heinrich